World spawn is located elsewhere than previously

The bug

If you generate a new world with the same seed of a world you generated in a previous version, the world spawn will be located somewhere else.

How to reproduce

1. Generate a new world in a previous version (e.g. 1.12.2) and use an easy to remember seed (different from 0), for example 1
2. Generate a new world with the same seed in the latest snapshot
3. The world spawn point will be at different places. In case of seed 1, in 1.12.2 it will be located at 164 64 256 and in the snapshot at -172 64 206